Tapes gauge



Oct. 12 1926., 3,602,645

IE. BUCKINGHAM TAPER GAUGE Filed April 2,5, 1923 ATTORNFV EABLE BUCKINWNEY COMPAhi 1,

Application filed April di al in thereon for indicating; the etcraccurac of the surface being consists in the features of couopera ionset forth in the fol- "ed in the '1 drawing a part of this drawin J andI have shown certain embodiinvention but it will be underthe inventioncan he otherwise eiuhodied and that the drawing is not to be c rucddefining; or liiniti the scope o e invention. the claims appended tothis :itication being relied upon for that purp ferrirug' to the figuresof the drawiiur: l igure l is an elevation of a gauge comprising oneform of my invention adapted to test the accuracy of internal conicalsurfaces.

Fig. 1 is cross section thereof on line L -l of lfig. 1.

Fig. 2 is a longitudinal sectional view of the gauge taken on line 2 -2of Fig. 1.

Fig. 2" is a fragmentary view similar to F but showing a slightmodification thereof.

E3" is an end view of the gauge shown in li i 2 Fig. 3 is a plan view ofa gauge comprising another form of my invention adapted to test theaccuracy of external conical. surfaces.

Fin:

4t is a side elevation thereof.

5 is a longitudinal sectional view 11 on line 5-5 of Fig. l.

6 is a fragmentary elevation of the g auge shown in Fig. 1 slightlymodified.

As illustrated in the drawing my invention comprises two relativelyspaced and relatively movable gauging: members each having a gaugingsurface thereon adapted GQNHECTsGU' AS IGNOB, T PRATT a "WI-KIT- ElGC-RZPGR-ATIOIT Oh NEW JERSEY.

the conical surface to be caused. Means are provided on the members folindicating the conical or taper accuracy of the sur ac such means funttioning by the axial relative spacing of the said two members. One

of the inen'ibers is also provided with means for indicating thediameter accuracy of the The drawing; illustrates one form sur surface.of gauge for testing; internal conical faces or openings and anotherform of testing external conical surfaces. A

ed will now be specifically ltli invention illustrat desrribed.

The gauge sho'iu in l and 5 3 for testing internal conical surfaces willfirst described. This gauge Y member 1 in the form of a sle 1 12 171;):one end hereof tapered to provice a conical gauging surface 2. A. secondand coaxial gauging: incn'ilier con'iprises rod 3 slidablj niountedwithin the sleeve and having a conical gauging surface t. at

end thereof. The suiiace l spaced a contiucatimi of the taper of thesurface 2 and the gauging operation is performed by the cooperation ofthese two surfaces. An operating knob 5 is pinned to the opposite end.of the rod 3.

The end of the sleeve adjacent the knob h is provided with a surfaceconu'lrisiug a plurality of steps 6. the end of the sleeve providing oneof such steps. These steps are adapted to be suggested by a projectioni" on the knob 5. A spring 8 mounted on the rod 3 between the gaugingportions 2 and l normally holds these portions in the spaced positionillustrated. the expansion of the spring 8 and therefore the spacing: ofthe fron'i and forms gauging portions are limited by the engagement ofthe progectron 7 with the end of the sleeve. It will be noted that their tei'inediate step (3 is marked Basic and the steps at the oppositesides thereof are marked +005 and--.OO5. it clearance notch 6 alsoprorided for purpose hereinafter described. The purpose and func tion ofthese features will be hereinafter described.

it will furtheru'iore be noted that in Figs. 1, 1 and 2, the sleeve 1 isnotched at 9 and 10 to provide two shoulders 9 and 10 on the conicalgauging surface 2 thereof. In Figs. 2 and 2 the end of the gaugingportion 4 is notched to provide two spaced end surfaces 1.1 and 12thereon. The function of these notched portions is to indicate theaccuracy of the diameter of the openings being gauged. The method ofusing such notches in the gauging operation is hereinafter described.

111 Fig. 2, the gauge is shown in operative en j cement with a checkring 13 havingcon cal opening 14 therein of the accurate or basic taperwhich the gauge is designed to measure. It will be understood that thegaugin surfaces 2 and 4: may become worn by use and such wear may insome cases be suiiicient to effect the accurary of the gauge. Thefunction of the check ring 13 is to test the gauge to determine itsaccuracy.

In originally constructing the gauge, the gauging elements 1 and 3 areaxially spaced to the position they would assume when the combinedsurfaces 2 and 4: are in position to form a. true cone of the taperwhich the gauge is constructed to measure. 1V ith the parts secured inthis relative position, the

step c marked Basic is formed on the sleeve flush with the end of theprojection 7 An adjacent higher step representing'.005 over-taper andanother adjacent and lower step representing .005 under-taper areprovided on the sleeve. It will be understood that if the conicalopening being tested is of accurate tap-er, as is the opening 14, theinsertion of the gauge into the" opening will compress the spring 8sufliciently to bring the end of the projection 7 flush with the basicstep. If the opening is over-tapered or too steep, the gauging portion 4cannot extend so far into such opening and the spring will be furthercompressed to move the end of projection 7 beyond the basicv step. Ifthe opening is under-tapered, the gauging portion l will extend furtherlnto the opening and the spring will not be com-' pressed sufficientlyto bring the end of the projection 7 flush with the basic step.

The operation of the gauge shown in Figs. 1 and 2 is as follows: Thegauge is first adjusted to seat the projection 7 in the notch 6, theparts being held in such position by means of the spring 8. The gauge isthen fully inserted into the conical opening to be tested, as shown inFig. 2. Such action will operate to compress the spring 8 and move theknob 5 away from the sleeve 1, unless the opening is considerablyundertapered. The spring being compressed, the operator rotates the knobin the direction of the arrow, relative to the sleeve 1 and theresulting position of the projection 7 indicates the taper accuracy ofthe opening. Should the projection remain in the notch 6, the opening isunder-tapered beyond the limit and would be rejected. Should theprojection be moved to seat on or above the +005 step, the opening isover-tapered. beyond the limit and would be rejected. If the projectionis on the basic step or between the basic step and one of the adjacentsteps, the opening is within the limits allowed and would be accepted.

As heretofore stated, the gauging portion 2 of the sleeve 1 is providedwith *0 notches 9 and 10 providing two shoulders 9 and 10 for gaugingthe diameter of the opening. These two shoulders represent the twodiameter limits of measurement allowed. In operation, the diameter ofthe opening is measured by the position assumed by the shoulders 9 and10 relative tothe inner face 18 of the piece being gauged. Should thegauge assume a position in this opening bringing th face 13* flush witheither shoulder or between such shoulders, the diameter is within thelimits allowed. However, should the face 13 be outside the limit 9,

the opening is too large and would there- Gcrtain work may require themeasuring of the diameter of the opening from the smaller end thereofinstead of from the larger end as just describec. For this pu"- pose,the gauging portion l may be provided with the end surfaces 11 and 12 asheretofore described. The operation ofthe with these limits is the sameas that t described in reference to the limits 9 and 10*. In operation.should the end face 13" come flush with or between the limits 11 and 12,the diameter of the opening, measured from the smaller end thereof iswithin the limits allowed. However, should the face 13 be without theselimits, the diameter is inaccurate beyond the limit allowed and wouldtherefore be rejected.

The gauge shown in Figs. 1 and 2 is adapted to function as a limitgauge, namely, to indicate a certain predetermined plus or minusinaccuracy. It may be desired in some instances to accurately indicatethe amount of plus or minus inaccuracy of taper of the surface beinggauged. This function can readily be performed by a gauge constructed inthe manner indicated in Fig. 6. This construction is sub.stan tially thesame as that shown in Fig. 1 and the like parts thereof have in Fig. 6been given the same reference characters but differentiated from thosein Figs. 1 and 2 by being primed. However, instead of providing the endof the sleeve with a stepped surface 6, as in Fig. 1, the same isprovided with a spiral surface 6 against which the is adapted to engage.These cooperating engaging portions are graduprojection I neoa c-s a tedt as indicated and the inaccuracy of iper can be readily and nnnutelydetermined )y reading the index mark on the projection 7 against the21Cl12LC611i7 scale on the end of the sleeve 1.

in Figs. 8, 4t and 5 have shown another form of my invention adapted totest the accuracy of external conical surfaces. This mechanism comprisesa gauging member 153 having bri ad sipportingr base 16 and an internalconical gauging surface or opening 17. A second gauging member 18 is1nount edto slide coarz'aliy over the member and has an internal conicalgauging surface or opening: 19 c axially of the surface 17. T1 tace isspaced from anrh in its basic position, forms a continuation of the n-erof ti 0 surface 17'. The opera is per formed by the cooperation of theretwo surfaces.

The lower cone of the member 18 is provith ed with three steps 20, 21and thereon axially advanced slightly relatively to each other and anotch 23 adjacent the s" 1 These oy three pins ti: ed into the ineinherl8 and exteiuhngg nto an annular groove 27 in the nieinher .r

For convenience operation. the has 16 is provided Wit? thre l M ccp z vl. 6 0

pending to the three at e tide): inarl is provii.

for cooperating there 3 and the niarlr '2- or is aeiacent the basic n at ion th i tcrinediate or basic step 1 in like manner the -.l05 marspends with the step E20 and the with the step 22. The upper end of themember 18 is also cut away to provide two cycle or shoulders and 30 forindicati a: the (lianeter accuracy of the pa t beinc; These shouldersrepresent the two i of diameter allowed as has been de crihed above inreference to 2 and 2". The principle of operation of this devi is thesain that above described in reference to Figs. 1 and 2.

The ope 'ation of the gauge shown in Figs 3, i, and 5 is as follows: Thegauging incinbcrs are first adjusted to place the notch over the pin 9The part to he te t d as the master plug; gauge Ell shown in i 5G isthen fully inserted into the openings 1? and 19. The spring 25 willthereby be compresscd a distance depending; upon the taper condition ofthe part being gauged. The operator then rotat ,s the member 18 on themember 15 in the direction of the arrow and the resulting position ofthe pin 25% indi- 1c taper accuracy of the part 31 hein result can bequickly r *at indicating marks on the nieinb '1 he i It will alsoaccuracy of he by the limits 29 and 30. reading" these results is the sed in reference to the and 2 and therefore i i llJCti herein.

re'n ,hown and described y as quick-acting and k are which can be easilyb uno 'illed help. in the gangatio i it is only necessary to engage withthe conical surface to he testincinber i i 'cction the arrow as dose.ibcd, The eaoily assume the position. the accuracy of both, tor of suchsurfaces.

dapted to be con-- ifereiot and if the gran re rca d r part being; tee

.ejai

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herennozi 2' c or of coniin con'ilnnation, a

ember having; a conical gauging ki led to contact with a portion of en"ice to be gauged, a second. ally ii in inlcr and having a ice spacediroin the rod adapted to contact the conical surface to be stop means onthe in TQOSl'iIiOD of the ptcd to indicate the z c being gauged by indisacing of the two nicnigauge for testing the taper of conical surfacescomprising in combination, aganging; member having a conical gaugingsuradaptcd to contact with a portion of the conical surface to be gaugeda second gaugii A neniber movable upon and axially relatlVG to saidfirst member and having a conical gauging surface adapted to contactwith another portion of the conical surface to be gauged, the saidmembers being coaxial one of said inen'ibers being provided with a stopand the other with a surface adapted to cooperate with said stop, thesaid surface Yin portions thereof at different axial po- :ions alone;the n ember whereby engageinent thereof by the stop will correspond tothe spacing of the gauging members in dif ferent relative axialpositions.

9 gauge for testing; the taper of conical surfaces comprising incombination, a gauging member having a conical gauging surconicalsurface to be gauged, asecond face spaced from the first gauging surfaceand adapted to contact with another portion of the conical surface to begauged, the sait members being coaxial, a spring coaxial with themembers and operating to normally hold the said gauging surfaces inspaced relation, and means cooperating with the members for indicatingthe conical or taoer accuracy of the said conical surface.

4-. A gauge for testing the taper of conical surfaces comprising incombination, gauging member having a conical gauging surface adaptcd tocontact with a portion of the conical surface to be gauged, a secondgaugmember having a conical gauging surface adapted to contac :ithanother portion of the conical surface to be gauged, the

said members being coaxial, one of said members being provided with astop and the other with a surface adapted to cooperate with said step,the said surface having portions thereof at different axial positionsalong the member whereby engagement thereof by the stop will correspondto the spacing of the gauging members in different relative axialpositions, and a spring cooperating with the members and operating tonormally hold the said gauging surfaces in spaced relation and the stopin contact with the said surface.

5. A gauge for testing the taper of conical surfaces comprising incombination, a gauging member having a conical gauging surface adaptedto contact with a portion of the conical surface to be gauged, a secondgauging member having a conical gauging surface movable upon the firstgauging member member having a conical gauging and adapted to contactwith another portion of the conical surface to be gauged, said membersbeing movable axially toward or from each other, one of said membersbeing provided with a plurality of stepped surfaces thereon, and meanson the other memher for engaging the stepped surfaces and adapted toindicate thereby the spacing of the gauging surfaces and the taperaccuracy of the surface being gauged.

A gauge for testing the taper of conical surfaces comprising incombination, a gauging member having a conical gauging surface adaptedto contact with a portion of the conical surface to be gauged, a secondgauging member having a conical gauging surface movable upon the firstgauging memher and adapted to contact with another portion of theconical surface to be gauged, said lz'iQlllb'lS being axially movabletoward or from each other, one of said members being provided with aplurality of'axially stepped surfaces thereon, and means on the othermember for engaging the stepped surfaces and adapted to indicate therebythe spacing of the gauging surfaces and the taper accuracy of'thesurface being gauged, one in termediate step and the cooperating partsof the gauge being so constructed that when the last named means isseated on the said one step, the gauging members are spaced to indicatea predetermined taper and when the said means is seated on other steps,the gauging members are relatively spaced in one direction or the otherto indicate plus or minus variations thereof.

in testimony whereof, I hereto aflix my signature.

EARLE BUCKINGHAM.

